<template>
    <div class="todo-header">
        <input type="text" v-model="title" placeholder="请输入你的任务名称，按回车键确认" @keyup.enter="add" />
    </div>
</template>

<script>
    import {nanoid} from 'nanoid'
    export default {
        name:'MyHeader',
        data() {
            return {
                title:''
            }
        },
        // props:['addTodo'],
        methods: {
            add(event){
                console.log(event.target.value)
                if (!this.title.trim) return alert('输入不能为空')
                // const todoObj = {id:nanoid(),title:event.target.value,done:false}
                const todoObj = {id:nanoid(),title:this.title,done:false}
                console.log(todoObj)
                //this.addTodo(todoObj) // props传递
                // 自定义事件--触发addTodo事件
                this.$emit('addTodo',todoObj)
                this.title = ''
            }
            /* add(){
                console.log(this.title)
            } */
        },
    }
</script>

<style scoped>
      /*header*/
  .todo-header input {
    width: 560px;
    height: 28px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 4px;
    padding: 4px 7px;
  }

  .todo-header input:focus {
    outline: none;
    border-color: rgba(82, 168, 236, 0.8);
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
  }
</style>